<template>
  <div>
    <h2>Left组件</h2>
    <p>{{ age }}</p>
    <button @click="age++">+1</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      age: 20
    }
  },
};
</script>

<style scoped>
div {
  min-height: 200px;
  background-color: rgb(9, 184, 102);
}
</style>